Grace is making party hats for her upcoming birthday party. A single hat has a diameter of 21 centimeters and a slant height of 38 centimeters. What is the lateral area of each party hat?
Answer
3,892.43 cm2
2,506.99 cm2
1,599.86 cm2
1,253.50 cm2

Question

Grace is making party hats for her upcoming birthday party. A single hat has a diameter of 21 centimeters and a slant height of 38 centimeters. What is the lateral area of each party hat?
Answer
		3,892.43 cm2
		2,506.99 cm2
		1,599.86 cm2
		1,253.50 cm2

.sam. · Answer

$$(\pi)(radius)(slant height) = (\pi)(10.5)(38) = 399(\pi)cm^2=1,253.50 cm ^{2}$$

anonymous · Answer

ok so do you not have to multiply it by 2?? i dont understand.. i thought that 2pi rh ?

.sam. · Answer

That's a formula you have to remember.